This one is a fun 'do for swimming (but you'll need stronger rubber bands than what I had, they broke, and the 'do came undone).
I parted the hair into four horizontal sections, all from ear to ear. The front row I divided into 5 sections, alternating rubber band colors. Then I divided the next row into four sections. I divided the front sections in half and added them into the second row's sections as I went. Again, I alternated rubber band colors.
I clipped up the third row and divided the bottom row into three sections. I divided the third row into two sections, and then came the tricky part. I divided the second row's sections in half, crossing over the middle two, and divided the center bottom section in half, adding all the sections into the third row's two pigtails.